I do not know if the series is true to the novel, which I have never read. But what is certain is that the Middle Ages offered to us here are exclusivly dark and cynical, probably far removed from reality. Any period, even the darkest, is never totally dark. Also, while I understand that succession issues are central to the period mentioned, this does not mean that they were unique and exclusive. The series revolves around conjugal episodes like flies around a cow dung. Too bad ; could have been a great series.